What’s Vulnerable › Vulnerabilities

CVE-2026-54071: BabelDOC: Arbitrary Code Execution via CMap Pickle Deserialization in babeldoc/pdfminer/cmapdb.py

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-14
• Weakness: CWE-502

Description

BabelDOC is a document translation tool. Prior to 0.6.3, BabelDOC's vendored PDF parser in babeldoc/pdfminer/cmapdb.py deserializes untrusted pickle data when CMapDB._load_data() loads CMap files. PDF-controlled Encoding or CMapName values and embedded PostScript usecmap operators can reach this sink after path separators are decoded, while _normalize_cmap_name() removes only a leading slash. Absolute paths or traversal sequences can escape the trusted CMap directories through os.path.join(), select an attacker-writable .pickle.gz file, and cause pickle.loads() to execute arbitrary Python code with the privileges of the BabelDOC process. This issue is fixed in version 0.6.3.

Affected products

• funstory-ai BabelDOC: before 0.6.3

References

• https://github.com/funstory-ai/BabelDOC/blob/main/docs/release-notes/v0.6.3.md
• https://github.com/funstory-ai/BabelDOC/commit/28f784ca6b437dbba040bfd9c67110373cd0924b
• https://github.com/funstory-ai/BabelDOC/releases/tag/v0.6.3
• https://github.com/funstory-ai/BabelDOC/security/advisories/GHSA-m8gf-v64p-gfmg

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